Weighing-scale.



"w. N. GILBERT.

WEIGHING SCALE.

APPLICATION FILED AUG. 7, 1907.

Patented Feb. 14, 1911.

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W. N. GILBERT.

WEIGHING SCALE.

APPLIOATION FILED AUG. 7, 1907.

Patented Feb. 14, 1911.

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WEIGHING SCALE.

APPLICATION TILED AUG. 7, 1907. 983,990. Patented Feb. 14, 1911.

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W. N. GILBERT. WEIGHING SCALE.

APPLICATION FILED AUG. 7, 1907.

Patented Feb.14,1911.

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WEIGHING SCALE.

APPLICATION FILED AUG.7,190'7.

983,990. I Patented Feb. 14, 1911.

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I n in eons UNITED STATES PATENT OFFICE.

WILLIAM N. GILBERT, OF BINGHAMTON, NEW YORK.

WEIGHING-SGALE.

Specification of Letters Patent.

Patented Feb. 14, 191i.

7 Application filed August 7, 1907. Serial No. 387,436.

'weighing scales, and it consists in the constru'ctions, combinationsand arrangements herein described and claimed.

.which extend the live rails constituting the load supports of thescale; the only portion of the scale exposed being the live railsextending j upward thr'ou tlonary platform. In this mproved con-StIllCtlOIl, the stationary platform. provides an eflieient protectionagainst the entrance of foreign substances, such as dirt, snow, ,etc., tthe scale, and also eliminates all danger of injury or breakage of thescale upon derailment of the cars, or other abnormal conditions.

A further object of my invention is to provide a weighing scale havinga-selfcontained system of weighing levers comprising coiiperating setsof main levers and extension levers, in which the several le VQYS ofeach set are suspended from a C0111- mon support; thereby insuring the1naintenanee of accurate adjustment inthe scale, and obviating thedefects occurring in existing types of scales through mountingtheseveral levers on separate and independen supports.

A further object of my invention is to provide an improved construction,in which the load is positively confined to an intermediate portionspaced from the ends of the system of weighing levers, 'and the shockand wear incident to localization of the load along any portion ofsaid-system is avoided.

In the accompanying drawings, forming a part of this application, and inwhich similar reference symbols indicate corresponding parts in theseveral views :-Figure 1 is a plan view on the line 1-1 of Fig. 2,illustrating one embodiment of my invention; the main levers beingomitted from the left hand end of said figure for clearness, and

'h slots in the stathe transverse supporting beams being similarlyomitted from the intermediate portion of the figure. Fig. 2 is alongitudinal sectional view on the line 2-2 of Fig. 1; F ig. 3 is alongitudinal sectional View, on a larger scale, on the line 3-3 ofFig.1; Figl t is a transverse sectional view on the. line 4+4 of Fig. 1;Fig. 5 is a transverse sectional-.yicw on the line 5-5 of Fig. 2; Fig. 6is a transverse sectional view on the line 66 of Fig. 3; Fig. 7 is adetail sectional view, illustral; ing guiding means engaging the endportions of the longitudinal 'I-beams for controlling the movement ofthe movable scale frame; Fig. 8 is a section view, on a larger scale, onthe line 88 of Fig. 4; Fig. 9 is a sectional view, on 'a larger scale,on the line 9 9 of Fig. 4; Fig. 10 is a detail end view of a preferred.form of pivot; Fig. 11 is a detail sectional View in the same plane asFig. 3, showing on a larger scale the support for the outer end of oneof the main levers; Fig. 12 is a. detail sectional view, on the sameplane as'Fig. 2, showing on a larger scale, the support for one of theextension levers and the connection of the main levers there to; andFig. l3 is a detail sectional view, clearly showing one of the liverails supported on the movable scale frame and extending through slotin'the stationary platform.

Referring to the. drawings, 1 indicates a pit which may be. lined andwalled with concrete. A plurality of cross I-beams 2 and Z beams 3 areshown embedded in the longitudinal walls 4t of the pit and supporting astationary platform 5, which latter extend.- between and constitutes theroad bed of the usual dead track rails (I.

Aseries of pairs of main levers 7 have their outer ends fulcrumed at 8in yokcs 9 supported by links 10, which latter are can ried by I-bolts11 extending through blocks 12 secured to the Z-beams 3. The inner endsof each pair of main levers are pivoted at 13 to yokes 14 carryingbearing blocks 15. A series of extension levers are suspended in the pitfor coiiperating with said main levers. Referring especially to Fig. 2,I have shown such series comprising a left hand set of four levers 16,17, 18 and 19. The end extension lever 16 is fulcrumed in a yoke 20supported on bolts 21 secured to the cross beams, and is pivotallyconnected at 2" to the adjacent extension lever 17; the levers l7 and 18are connected by links 23 to oppo- '25 to opposite ends of an equalizinglever 26; and the lever 19 is pivotally connected to a yoke 27 engagingan eye 28 secured to the inner end of a scale lever 29. The right handset of extension levers comprises an end lever 30 havingits outer endfulcrumed in a yoke 20 and supported on bolts 21, in a manner similar tothe support of the extension lever .16; the inner end of said lever 30is pivotally connected at 31 to the adjacent extension lever 32; theextension levers 32 and 33 are connected by links 34 to the ends of anequalizing lever 35; and the end of the lever 33 is connected by a yoke36 to the eye 28 on the scale beam 29. Each of the extension levers 17,18, 19, 32 and 33 is fulcrumed at 41 in a yoke 37 supported by I-bolts38'carried by angle plates 39, which latter is secured to the Z-beams 3and one of the adjacent I-beams 2. A pivot extends through eachextension lever adjacent to its.fulcrum for engagement by the bearingblocks 15 carried by the yokes 14 on the inner .ends of thecorresponding pair of main levers 7; the space between the piv- I guides43.

ots 40 and the fulcru ms 41 being determined by the leverage andcharacter of lever desired. Fig. 10- illustrates a referred constructionfor the fulcrums {UN pivots oi the several levers. In this construction,the pivot is formed with a cylindrical central portion 60 adapted toextend through and be socured to the lever, and with squared ends 61adapted to enter the eyes ot. the supporting yokcs. The squared ends areformed with steel bearing edges 62 embedded in the wrought iron bodyportion (33; thereby insuring a durable and strong pivotal support.

From the above description, it will be seen that. each pair of mainlevers and their cooperating extension lever constitute a. set of leversfulcrumcd in yokes suspended from a common support thereby insuring anaccurate maintenance of the proper.relation between said several levers,and eliminating the danger of the levers becoming shifted out ofadjustment, which is incident to the employment of independent leversupports in previous types of scales. Further, it will be clear that theyokes 9, links 10 and I-bolts 11 supporting the fulcrums of the mainlevers, and the yokes 37 and I-bolts38 supporting the fulcrums of theextension levers permit slight longitrulinal adjustment of said leversto compensate for variations in temperature and other practicalconditions.

Angle irons 42 are shown secured to the plates 39 and and provided withvertical Links 44 have their outer ends pivoted at 45 to the movablescale frame, and their inner ends providedwith eyes 46 slidably engagingthe guides 43, for controlling l or directing the movement of saidframe. The movable scale frame comprises two longitudinal I-beams 4.7,rigidly connected to-' gcther by series of suitable braces 48,49,21hd50. The lower edges of the longitudinal I- beams 47 are provided withhearing plates 51 for engaging suitable bearings, such as the portingthe movable frame on said levers. As shown especially in Fig. 7, anangle iron 53 is secured to one or both ends of the longiudinal beams 47and carries a vertical. guide 54. The guide 54 slidably engages an eye55 in-.a link 56,'which latter is pivotally secured at 57 to a bracket'58 embedded in the end wall 59 of .the pit; thereby providing anadditional guiding means cooperating with the guides 43 for controllingthe movement of the movable frame.

Referring-to Figs. 1, 2, 3, 4 and 13, the brace beams 50 are secured inpairs to the longitudinal I-beams Nat points, between the severalI-beams 2 supporting the stationary platform 5. Chairs 64 are suitablysecured on'each pair of beams 50, as by bolts the chairs 64.- and extendupwardly through slots 67 in the stationary platform 5, to con stitntethe load supports of the scale. Guards 68,.preferably formed of metalplates, are secured to the stationary platform 5 in position to shieldthe slots 67 in the latter from the entrance of forei n substances, andalso to shield ment of the cars, or other abnormal conditions.

As shown especially in Figs. 1 and 3, the live rails (36 extend alongthe intermediate portion of the movable scale frame, and terminatc at adistance from the ends of the system of weighing levers; therebyproviding a. long stationarily supported overhang 69 at each end of thesystem of lovers. By this construction, the loaded car to be weighed apoint substantially midway between the tulcrums of the first twoextension levers at the end of the scale; thereby producing a system oflevers. This constitutes an important part of my invention, and it hasbeen found in practice that, by so confining the load to an intermediate'portion of the movable scale frame, the shock and wear occurring inexisting types of scales through initial localization of the load on theend levers of the system is avoided.

Referring to Figs. 1, 2, 3, 4 and 9, the scale lever 29 is fulcrumed at70 in a yoke 71 supported by two I-bolts 72. The I-bolts 72 are carriedby an angle plate 73 secured to channel beams 7-t, which are rigidlysupported in the walls of the pit. This method of fulcruming the scalelever, together with the yoke 27and eye 28 connecting the inner e liverails (36 in case ofderail will first strike the live-track rails. 66 atuniform distribution of the ldad'over the knife edges 52,011 the mainlevers, for sup-.

65. The live track rails 66 are secured on end. of said lever, providessufficient playto prevent binding and to meet all conditions occurringin practice.

The outer end of the scale lever 29 carries a yoke '75, which is securedto the scale beam by a link 76 in the usual manner.

I have illustrated a preferred and satisfactoryconstruction, but,obviously, changes could be made in the number of levers employed andother details within the spirit and scope of my invention.

Having thus described my invention, what I claim as new therein anddesire to secure by Letters Patent is 1. In aweighing scale, thecombination of a movable frame, a system of weighing levers supportingsaid frame, load supports carried by said frame, a stationary platformrigidly supported above said frame and provided with slots for receivingsaid load supports, and guards extending upwardly from said platform forshielding said slots and load supports, substantially as described.

2. In a weighing scale, the combination of a plurality of rigidlysupported beams, a stationary platform supported on said beams andprovided with slots, :1 system of weighing levers suspended from saidbeams, a movable frame positioned beneath said stationary platform andsupported by said systems of levers, and load supports carried by saidframe and extending through said slots in the platform, substantially asdescribed.

3. In a weighing scale, the combination of a connected systen'i ofWeighing levers, load supports carried thereby and terminatingsubstantially midway between the fulcrums of the end pairs of saidlevers, a stationary platform rigidly supported above said system oflevers and provided with slots for receiving said load supports, andguards for shielding said slots and load supports, substantially asdescribed.

4. In a weighing scale, the combination of a plurality of rigidlysupported beams, a stationary platforin supported on said beams andprovided with slots, a system of weigh-- ing levers suspended from saidbeams, a 'movable frame positioned beneath said stationary platform andsupported by sald sysl l l, l i

tem of levers, load supports carried by said frame and extending throughsaid slots in the platform, and guards carried by said platform forshielding said slots and load supports, substantially as described.

5. In aweighing scale, the combination of a system of weighing leverscomprising coiiperating extension, levers and sets of main levers, acommon support for the sev-' eral levers of each set, a movable framesupported by said system of levers, load supports carried by said frame,and guides carried by said supports of the levers for controlling themovement of said frame, substantially as described.

6. In a weighing scale, the combination of a system of weighing leverscomprising cotiperating extension levers and sets of main levers, acommon support for the several levers of each set, a movable framesupported by said system of levers, load sup ports carried by saidframe, and links connecting said frame to the supports of the levers forcontrolling the movement of said frame, substantially as described.

7. In a weighing scale, the combination of a system of weighing leverscomprising coiiperating extension levers and sets of main levers, acommon support for ,,the several levers of each set, a movable framesupported by said system of levers, load supports carried by said frame,guides cargied by the supports of said levers, and links connected tosaid frame and slidably engaging said guides, substantially asdescribed.

8. In a weighing scale, the combination of a system of weighing levers,a stationary platform extending over said system of levers and providedwith slots-terminating at a distance from its ends, a movable framesupported on said system of levers, and load supports extending upwardfrom said'frame through said slots in the stationary platfgrm,substantially as described.

In testimony whereof I affix my in presence of two witnesses.

WILLIAM N. GILBERT.

signature Witnesses:

JAMES W. STURTEVANT, CHARLES A. BALL.

